Metallic grinding-plate



(No Model.)

B. M. MGKEE.

METALLIC GRINDING PLATE.

Patented Apr'u 28, 1885.

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EMMETT M. MOKEE, OF BATAVIA, ILLINOIS.

METALLIC GRlNDlNG pLATE.

EiiPECIFICATION forming part of Letters Patent No. 316,478, dated April 28, 1835.

Application filed July 14, 1884. (No model.)

To (1% whom it may concern.-

Beitknown that I, EMMETTM. MoKEaresiding at Batavia, in the county of Kane and State of Illinois, have invented certain new and useful Improvements in Metallic Grinding-Plates, of which the following, in connection with the accompanying drawings, is a specification.

In the drawings, Figure 1 is a face View of the working-face of my improved metallic grinding-plate. Fig. 2 is a section of the same in the plane of the line 00 00 of Fig. l viewed in the direction indicated by the arrow there shown; andFig. 3 is a section in the plane of the line y 3 of Fig. 1 viewed in the same direction.

Like letters of reference indicate like parts.

A represents an annular metallic grindingplate, the central opening, a, being of about the usual dimensions.

B B are the largest or longest drifts. These drifts lie inlines tangential to the center of the plate, and their inner ends are vertical and meet the inner edge of. the plate A, which edge is rounded off, as shown at b b. The inner ends of the drifts B B are thus made to perform the function. of gathering ends or points standing up or projecting from the plate near its inner edge, as shown. One side of each gathering end or point is fiat or vertical, as shown at c a, and the other side meets the curvature of the plate A in a curved line, as shown at c 0.

O is a channel or depressed portion of the plate A, and forms a comparatively narrow portion of its workingface, and lies at or near its outer edge. The drifts B 13 extend to the channel 0, as shown, and diminish in height as they approach the said channel, owing to the curvature of the face of the plate; but their upper edges all lie in the same plane. These large drifts are dressed straight from their inner ends nearly to their outer ends, where they are very slightly curved, as indicated, and they are arranged at equal distances apart.

D D are double drifts having the same general direction as the drifts B B and beginning at the channel 0 and extending inwardly about two-thirds across that working portion of the face of the plate A which is between the said channel and the inner edge of the plate. These double drifts are about midway between the drifts B B, and one part: of each double drift is somewhat shorter than the other, as represented,and is somewhat lower, v

also, than the longer part.

One advantage of the double drifts D D is that the grain will be partly broken by one and more thoroughly pulverized by the other, as the first ridge of the said drift is somewhat lower than the second or other part thereof.

E E are drifts arranged between the drifts B B and the driftsD D. These drifts extend to the channel 0, but are not as long as the drifts D D.

F F are drifts extending from the outer edge or rim of the plate inward toward the drifts B, D, and E, respectively, but not meeting them; and G G are shorter drifts arranged between the drifts F F, and one or more drifts G G may be arranged between each pair of drifts F F.

It will be perceived that the drifts B, D, and E and their continuations F F are in lines somewhat curvilineal. The inner ends of some of the drifts are united gradually or taperingly with the face of the plate A-such, for example, as the drifts D, E, and G. In other words, these drifts gradually decrease in height until they coincide with the surface of the main part of the plate.

It will be perceived that the channel 0 is annular or extends entirely around the plate, and that the drifts F and G do not extend to the inner edge of the said channel, thus leaving an undressed annular portion between. the outer and inner sets of drifts. By this means the plate is not as liable as heretofore to be worn or injured,and the construction and arrangement of drifts described gather, break or cut, and distribute the broken particles with advantage.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. An annular metallic grindingplate having on its working-face an undressed annular portion or channel, 0, a series of drifts arranged between the inner edge of the said plate and the said channel, and anouter series of drifts arranged between the said channel and the outer edge of the said plate, but not extending across the said channel, substantially as and for the purposes specified.

ICO

2. An annular metallic grinding-plate hav- I v 4. An annular metallic grinding-platehaving a rounded-off inner edge, b, the annular depressed portion or channel 0, the drifts B B, extending from the said channel to the edge I) and forming gathering-points at the said edge, a series of drifts arranged between the drifts B B, and a series of drifts arranged between the channel 0 and the outer edge of the said plate, substantially as and for the purposes specified.

3. An annular metallic grinding-plate hava rounded-off inner edge, b, the drifts B, the channel or depressed portion 0, the double drifts D D, and a series of drifts arranged between the said channel and the outer edge of the said plate, substantially as and for the purposes specified.

ing a rounded-off inner edge, b, the drifts B, the channel or depressed part 0, the double drifts D D, the driftsE E, and the drifts Fand G, all made and arranged substantially as shown and described,and for the purposes set forth. i

In testimony that I claim the foregoing as my own I hereto affix my signature in presence of two witnesses.

EMMETT M. MOKEE.

Witnesses:

F. F. WARNER, J. B. HALPENNY. 

